Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f192d648b054b32…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 17:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a207264673ea9a54df15f5c7a5ae163 SHA-1: 6c99ff730f6064178ad0ab0289261fad611051a5 SHA-256: 2f192d648b054b32c23d31315a1f31e8be3620ed41c8411dc0ede46d2581562d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links, including one that redirects to malicious infrastructure at `ttraff.cc`. The document body text, though partially corrupted, contains the phrase "Cgst act pdf file" and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The presence of a "PDF_SEO_LINK_FARM" heuristic indicates a large number of external links, many hosted on `cdn.shopify.com`, likely to improve search engine ranking for malicious content.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=cgst+act+pdf+file
    • http://files.akomaarts.org/uploads/1/3/0/9/130969659/9eeecc107413e78.pdf
    • http://files.niacurriculum.com/uploads/1/3/2/3/132303359/5693948.pdf
    • https://cdn.shopify.com/s/files/1/0461/7260/2531/files/betaina_dosagem_usual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/48916409208.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/19646932114.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/58773710318.pdf
    • https://cdn.shopify.com/s/files/1/0448/0339/1645/files/belajar_tajwid_lengkap_beserta_contohnya.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/wabululutuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/fufopibolol.pdf
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/33294927863.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/akon_doing_90_in_a_65.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2261/files/halimbawa_ng_aksyon_na_pananaliksik.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/cage_dive_full_movie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006080.bin
4649540f2f386385ae64dfbf8eb5a166480c327b246e26dd75a4305eff43196d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 5132 bytes
font_01_sfnt_off00007208.bin
3e77c8002c8656aa934fac83aed4c9c3d1b82f338588bef209a2af15001412b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 10404 bytes

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